2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
181 lines
7.3 KiB
C
181 lines
7.3 KiB
C
/* $NetBSD: ext2fs_dir.h,v 1.18 2009/10/19 18:41:17 bouyer Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dir.h 8.4 (Berkeley) 8/10/94
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* Modified for ext2fs by Manuel Bouyer.
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*/
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/*
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* Copyright (c) 1997 Manuel Bouyer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @(#)dir.h 8.4 (Berkeley) 8/10/94
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* Modified for ext2fs by Manuel Bouyer.
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*/
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#ifndef _UFS_EXT2FS_EXT2FS_DIR_H_
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#define _UFS_EXT2FS_EXT2FS_DIR_H_
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/*
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* Theoretically, directories can be more than 2Gb in length, however, in
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* practice this seems unlikely. So, we define the type doff_t as a 32-bit
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* quantity to keep down the cost of doing lookup on a 32-bit machine.
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*/
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#define doff_t int32_t
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#define EXT2FS_MAXDIRSIZE INT32_MAX
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/*
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* A directory consists of some number of blocks of e2fs_bsize bytes.
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*
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* Each block contains some number of directory entry
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* structures, which are of variable length. Each directory entry has
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* a struct direct at the front of it, containing its inode number,
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* the length of the entry, and the length of the name contained in
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* the entry. These are followed by the name padded to a 4 byte boundary
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* with null bytes. All names are guaranteed null terminated.
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* The maximum length of a name in a directory is EXT2FS_MAXNAMLEN.
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*
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* The macro EXT2FS_DIRSIZ(fmt, dp) gives the amount of space required to
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* represent a directory entry. Free space in a directory is represented by
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* entries which have dp->e2d_reclen > DIRSIZ(fmt, dp). All d2fs_bsize bytes
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* in a directory block are claimed by the directory entries. This
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* usually results in the last entry in a directory having a large
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* dp->e2d_reclen. When entries are deleted from a directory, the
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* space is returned to the previous entry in the same directory
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* block by increasing its dp->e2d_reclen. If the first entry of
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* a directory block is free, then its dp->e2d_ino is set to 0.
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* Entries other than the first in a directory do not normally have
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* dp->e2d_ino set to 0.
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* Ext2 rev 0 has a 16 bits e2d_namlen. For Ext2 vev 1 this has been split
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* into a 8 bits e2d_namlen and 8 bits e2d_type (looks like ffs, isnt't it ? :)
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* It's safe to use this for rev 0 as well because all ext2 are little-endian.
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*/
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#define EXT2FS_MAXNAMLEN 255
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struct ext2fs_direct {
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uint32_t e2d_ino; /* inode number of entry */
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uint16_t e2d_reclen; /* length of this record */
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uint8_t e2d_namlen; /* length of string in d_name */
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uint8_t e2d_type; /* file type */
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char e2d_name[EXT2FS_MAXNAMLEN];/* name with length<=EXT2FS_MAXNAMLEN */
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};
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/* Ext2 directory file types (not the same as FFS. Sigh.) */
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#define EXT2_FT_UNKNOWN 0
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#define EXT2_FT_REG_FILE 1
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#define EXT2_FT_DIR 2
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#define EXT2_FT_CHRDEV 3
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#define EXT2_FT_BLKDEV 4
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#define EXT2_FT_FIFO 5
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#define EXT2_FT_SOCK 6
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#define EXT2_FT_SYMLINK 7
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#define EXT2_FT_MAX 8
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#define E2IFTODT(mode) (((mode) & 0170000) >> 12)
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static __inline uint8_t inot2ext2dt(uint16_t) __unused;
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static __inline uint8_t
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inot2ext2dt(uint16_t type)
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{
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switch (type) {
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case E2IFTODT(EXT2_IFIFO):
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return EXT2_FT_FIFO;
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case E2IFTODT(EXT2_IFCHR):
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return EXT2_FT_CHRDEV;
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case E2IFTODT(EXT2_IFDIR):
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return EXT2_FT_DIR;
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case E2IFTODT(EXT2_IFBLK):
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return EXT2_FT_BLKDEV;
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case E2IFTODT(EXT2_IFREG):
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return EXT2_FT_REG_FILE;
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case E2IFTODT(EXT2_IFLNK):
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return EXT2_FT_SYMLINK;
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case E2IFTODT(EXT2_IFSOCK):
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return EXT2_FT_SOCK;
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default:
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return 0;
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}
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}
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/*
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* The EXT2FS_DIRSIZ macro gives the minimum record length which will hold
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* the directory entryfor a name len "len" (without the terminating null byte).
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* This requires the amount of space in struct direct
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* without the d_name field, plus enough space for the name without a
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* terminating null byte, rounded up to a 4 byte boundary.
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*/
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#define EXT2FS_DIRSIZ(len) roundup2(8 + len, 4)
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/*
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* Template for manipulating directories. Should use struct direct's,
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* but the name field is EXT2FS_MAXNAMLEN - 1, and this just won't do.
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*/
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struct ext2fs_dirtemplate {
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uint32_t dot_ino;
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int16_t dot_reclen;
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uint8_t dot_namlen;
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uint8_t dot_type;
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char dot_name[4]; /* must be multiple of 4 */
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uint32_t dotdot_ino;
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int16_t dotdot_reclen;
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uint8_t dotdot_namlen;
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uint8_t dotdot_type;
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char dotdot_name[4]; /* ditto */
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};
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#endif /* !_UFS_EXT2FS_EXT2FS_DIR_H_ */
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